155332401 has 24 divisors (see below), whose sum is σ = 247443840. Its totient is φ = 86359392.

The previous prime is 155332357. The next prime is 155332403. The reversal of 155332401 is 104233551.

It is not a de Polignac number, because 155332401 - 2⁶ = 155332337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155332403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8841 + ... + 19718.

It is an arithmetic number, because the mean of its divisors is an integer number (10310160).

Almost surely, 2^155332401 is an apocalyptic number.

It is an amenable number.

155332401 is a deficient number, since it is larger than the sum of its proper divisors (92111439).

155332401 is a wasteful number, since it uses less digits than its factorization.

155332401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28613 (or 28606 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 155332401 is about 12463.2419939597. The cubic root of 155332401 is about 537.5522513473.

Adding to 155332401 its reverse (104233551), we get a palindrome (259565952).

The spelling of 155332401 in words is "one hundred fifty-five million, three hundred thirty-two thousand, four hundred one".